Office chair



FIG. 1 is a front and top perspective view of an office chair, showing my new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of a portion indicated with numeric 9 in FIG. 1;

FIG. 10 is an enlarged view of a portion indicated with numeric 10 in FIG. 1; and,

FIG. 11 is an enlarged view of a portion indicated with numeric 11 in FIG. 3.

The broken lines in the figures illustrate portions of the article that form no part of the claimed design. The dash dot dash lines in FIGS. 1, 3, 9, 10 and 11are for the purpose of depicting the cut line of the enlarged view and form no part of the claim. 

CLAIM The ornamental design for an office chair, as shown and described. 